<template>
  <div class="list" ref="wrapper">
  <div>
    <div class="area">
      <div class="title border-topbottom">当前城市</div>
      <div class="button-list">
        <div class="button-wrapper">
          <div class='button'>{{this.currentCity}}</div>
        </div>
      </div>
    </div>
    <div class="area">
      <div class="title border-topbottom">当前热门</div>
      <div class="button-list">
        <div class="button-wrapper" 
         v-for="item of hot"
         :key="item.id"
         @click="handleCityClick(item.name)"
        >
          <div class='button'>{{item.name}}</div>
        </div>
      </div>
    </div>
    <div class="area" v-for="(item,key) of cities" 
     :key="key"
     :ref="key">
      <div class="title border-topbottom">{{key}}</div>
      <div class="item-list">
        <div class="item border-bottom"
         v-for="innerItem of item"
         :key="innerItem.id"
         @click="handleCityClick(innerItem.name)"
         >{{innerItem.name}}</div>
      </div>
    </div>
  </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'
export default{
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        console.log(element)
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .list
    overflow:hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      color: #666
      font-size: .26rem
      padding-left: .2rem
    .button-list
      padding: .1rem .6rem .1rem .1rem
      overflow: hidden
      .button-wrapper
        width: 33.33%
        float: left
        .button
          margin: .1rem
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
